/*
 * Copyright (c) 2012 swing-on-fire Team
 * 
 * This file is part of Swing-On-Fire (http://code.google.com/p/swing-on-fire), licensed under the terms of the MIT
 * License (MIT).
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
 * Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package com.google.code.swingonfire.utility;

public class TypeConversion
{

    public static boolean isConvertable(Class<?> fromType, Class<?> toType)
    {
        if (fromType == toType)
        {
            return true;
        }

        if (toType.isAssignableFrom(fromType))
        {
            return true;
        }

        if (toType == String.class)
        {
            return true;
        }

        fromType = Reflection.cultivate(fromType);
        toType = Reflection.cultivate(toType);

        if (Number.class.isAssignableFrom(toType))
        {
            return (Number.class.isAssignableFrom(fromType));
        }

        return false;
    }

    public static Object convert(Object value, Class<?> toType)
    {
        Class<?> fromType = (value != null) ? Reflection.cultivate(value.getClass()) : Void.class;

        if (fromType == toType)
        {
            return value;
        }

        if (toType.isAssignableFrom(fromType))
        {
            return value;
        }

        if (toType == String.class)
        {
            return (value != null) ? String.valueOf(value) : null;
        }

        toType = Reflection.cultivate(toType);

        if (Number.class.isAssignableFrom(toType))
        {
            if (Number.class.isInstance(value))
            {
                if (toType == Integer.class)
                {
                    return ((Number) value).intValue();
                }

                if (toType == Double.class)
                {
                    return ((Number) value).doubleValue();
                }

                if (toType == Long.class)
                {
                    return ((Number) value).longValue();
                }

                if (toType == Float.class)
                {
                    return ((Number) value).floatValue();
                }

                if (toType == Byte.class)
                {
                    return ((Number) value).byteValue();
                }

                if (toType == Short.class)
                {
                    return ((Number) value).shortValue();
                }
            }
        }

        throw new IllegalArgumentException(String.format("Failed to convert %s (%s) to %s", String.valueOf(value),
            fromType, toType));
    }


}
